fix pipe closed issue, and a lot of other stuff

Dockerfile

@@ -0,0 +1,20 @@
+FROM golang:1.23-bookworm as builder
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+RUN GOOS=linux go build -o fluxd cmd/fluxd/main.go
+
+RUN (curl -sSL "https://github.com/buildpacks/pack/releases/download/v0.36.0/pack-v0.36.0-linux.tgz" | tar -C /usr/local/bin/ --no-same-owner -xzv pack)
+RUN apt-get install -y ca-certificates
+
+EXPOSE 5647 7465
+
+VOLUME [ "/var/run/docker.sock" ]
+
+CMD ["/app/fluxd"]